Tt→Sensors Central Nerves Exercise Ach Cardio Redistribution Local output 1 of BF NE receptors↓ Ca2+ Vasodilation active PHI Metabolic ratet BF t Passive Permeability of vessel wall f T↓ Local heating NE Blood viscosityt receptors t BF T↑Local heating T Sensors Nerves NE receptors Ach Ca2+ Cardio output Redistribution of BF BF T NE receptors PH Metabolic rate Permeability of vessel wall Blood viscosity BF T Central Local Exercise Vasodilation active Passive CO2